.page-contact {
  --pc-slip-bg: rgba(20, 27, 33, .72);
  --pc-lake-wash: rgba(30, 127, 194, .14);
  --pc-sunset-wash: rgba(255, 122, 47, .13);
}

.page-contact #channels,
.page-contact #verify,
.page-contact #compare,
.page-contact #response,
.page-contact #fix {
  scroll-margin-top: 96px;
}

.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--sunset);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 首屏 ---------- */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 4vw, 42px) 0 clamp(20px, 3.6vw, 40px);
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: -20% -25% auto -25%;
  height: 165%;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .22;
  transform: rotate(-4deg);
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 68% 58% at 26% 22%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse 68% 58% at 26% 22%, #000 0%, transparent 74%);
}

.page-contact .pc-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-contact .pc-overline {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--lake-soft);
}

.page-contact h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-contact .pc-lede {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: clamp(16px, 1.5vw, 17px);
  line-height: 1.78;
  color: var(--text);
  opacity: .9;
}

.page-contact .pc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-contact .pc-hero-actions .btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-contact .pc-hero-side {
  background: var(--pc-slip-bg);
  border: 1px solid var(--line);
  border-top: 3px solid var(--lake);
  border-radius: 20px 20px 20px 6px;
  padding: 22px 22px 20px;
}

.page-contact .pc-side-title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .pc-side-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: side;
  display: grid;
  gap: 14px;
}

.page-contact .pc-side-list li {
  position: relative;
  counter-increment: side;
  padding-left: 38px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .pc-side-list li::before {
  content: counter(side, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--sunset);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 5px;
}

.page-contact .pc-side-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--lake-soft);
}

/* ---------- 目录条 ---------- */
.page-contact .pc-index {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 14, 17, .72);
}

.page-contact .pc-index-inner {
  display: flex;
  gap: 10px;
  padding: 12px 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-contact .pc-index-inner::-webkit-scrollbar {
  height: 4px;
}

.page-contact .pc-index-inner::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}

.page-contact .pc-index-link {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .pc-index-link:hover {
  color: var(--paper);
  border-color: var(--lake);
  background: var(--pc-lake-wash);
}

.page-contact .pc-index-link[data-active] {
  color: var(--paper);
  background: var(--lake);
  border-color: var(--lake);
}

/* ---------- 通用章节 ---------- */
.page-contact .pc-section {
  padding: clamp(44px, 7vw, 88px) 0 0;
}

.page-contact .pc-head {
  max-width: 780px;
  margin-bottom: clamp(22px, 3.4vw, 40px);
}

.page-contact .pc-head .section-num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--sunset);
}

.page-contact .pc-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.25;
  color: var(--paper);
}

.page-contact .pc-head-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 联系方式 ---------- */
.page-contact .pc-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .pc-channel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px 22px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  transform: translateY(-2px);
  border-color: var(--lake-soft);
}

.page-contact .pc-channel--mail {
  background:
    radial-gradient(120% 130% at 100% 0%, rgba(30, 127, 194, .3), transparent 62%),
    var(--ink-2);
  border-color: rgba(30, 127, 194, .55);
}

.page-contact .pc-channel-badge {
  align-self: flex-start;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--v-yellow);
  border-radius: 999px;
  padding: 4px 10px;
}

.page-contact .pc-channel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}

.page-contact .pc-contact-value {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.2vw, 17px);
  letter-spacing: .01em;
  line-height: 1.5;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .pc-channel-meta {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--lake-soft);
}

.page-contact .pc-copy {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--lake-soft);
  background: transparent;
  border: 1px solid rgba(124, 192, 230, .45);
  border-radius: 999px;
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .pc-copy:hover {
  color: var(--paper);
  border-color: var(--lake-soft);
  background: var(--pc-lake-wash);
}

.page-contact .pc-copy[data-copied] {
  color: var(--v-green);
  border-color: var(--v-green);
  background: rgba(47, 163, 107, .12);
}

/* ---------- 四步流程 ---------- */
.page-contact .pc-steps {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 22px;
}

.page-contact .pc-steps::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lake), var(--sunset));
  opacity: .45;
}

.page-contact .pc-step {
  position: relative;
  padding: 20px 20px 16px;
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 18px 18px 18px 6px;
  transition: transform .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .pc-step:hover,
.page-contact .pc-step:focus-within {
  transform: translateY(-2px);
  border-color: var(--sunset);
  background: var(--ink-2);
}

.page-contact .pc-step-num {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sunset);
}

.page-contact .pc-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .pc-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .pc-fold {
  margin-top: 14px;
  padding-top: 4px;
  border-top: 1px dashed var(--line);
}

.page-contact .pc-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  min-height: 44px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--lake-soft);
}

.page-contact .pc-fold summary::-webkit-details-marker {
  display: none;
}

.page-contact .pc-fold summary::after {
  content: "展开";
  font-size: 11px;
  color: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 9px;
}

.page-contact .pc-fold[open] summary::after {
  content: "收起";
  color: var(--sunset);
  border-color: rgba(255, 122, 47, .5);
}

.page-contact .pc-mini-list {
  margin: 0;
  padding: 6px 0 4px;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .pc-mini-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
  opacity: .85;
}

.page-contact .pc-mini-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 1px;
  background: var(--lake-soft);
}

/* ---------- 图形容器 ---------- */
.page-contact .pc-figure {
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 14px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
}

.page-contact .pc-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 12px;
  object-fit: cover;
}

.page-contact .pc-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 对照材料 ---------- */
.page-contact .pc-compare {
  display: grid;
  gap: 22px;
}

.page-contact .pc-compare-main p {
  margin: 0 0 18px;
  max-width: 54ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--text);
  opacity: .9;
}

.page-contact .pc-tags {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.page-contact .pc-tag {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--lake-soft);
  background: var(--pc-lake-wash);
  border: 1px solid rgba(124, 192, 230, .34);
  border-radius: 10px 10px 10px 4px;
}

.page-contact .pc-tag--sunset {
  color: var(--sunset);
  background: var(--pc-sunset-wash);
  border-color: rgba(255, 122, 47, .4);
}

.page-contact .pc-compare-note {
  margin-top: 20px !important;
  font-size: 14px !important;
  color: var(--mist) !important;
  opacity: 1 !important;
}

.page-contact .pc-note-card {
  padding: 18px 20px;
  background: var(--pc-sunset-wash);
  border-left: 3px solid var(--sunset);
  border-radius: 0 16px 16px 0;
}

.page-contact .pc-note-title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--sunset);
}

.page-contact .pc-note-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
  opacity: .92;
}

.page-contact .pc-note-links {
  margin-top: 12px !important;
  font-size: 13.5px !important;
  color: var(--mist) !important;
}

.page-contact .pc-note-links a {
  color: var(--lake-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .pc-note-links a:hover {
  color: var(--paper);
}

/* ---------- 响应时效 ---------- */
.page-contact .pc-response {
  display: grid;
  gap: 28px;
}

.page-contact .pc-response-list {
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .pc-response-list li {
  padding: 14px 16px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 14px 14px 14px 4px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .pc-response-list strong {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--lake-soft);
}

.page-contact .pc-timebar {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}

.page-contact .pc-tick {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.page-contact .pc-tick-day {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-contact .pc-tick-bar {
  position: relative;
  display: block;
  width: 100%;
  height: 54px;
  overflow: hidden;
  background: var(--ink-3);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.page-contact .pc-tick-bar::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
}

.page-contact .pc-tick--on .pc-tick-bar::after {
  height: 64%;
  background: linear-gradient(180deg, var(--lake-soft), var(--lake));
  opacity: .85;
}

.page-contact .pc-tick--off .pc-tick-bar::after {
  height: 16%;
  background: var(--line);
}

.page-contact .pc-legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  font-size: 12.5px;
  color: var(--mist);
}

.page-contact .pc-legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  margin-left: 12px;
}

.page-contact .pc-legend-dot:first-child {
  margin-left: 0;
}

.page-contact .pc-legend-dot--on {
  background: var(--lake);
}

.page-contact .pc-legend-dot--off {
  background: var(--line);
}

.page-contact .pc-figure--side {
  margin-top: 0;
}

/* ---------- 纠错与合作 ---------- */
.page-contact .pc-fix-grid {
  display: grid;
  gap: 18px;
}

.page-contact .pc-fix-card {
  padding: 24px 22px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 20px 20px 20px 6px;
}

.page-contact .pc-fix-card--edit {
  border-top: 3px solid var(--v-yellow);
}

.page-contact .pc-fix-card--coop {
  border-top: 3px solid var(--v-green);
}

.page-contact .pc-fix-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .pc-fix-card p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .pc-fix-card p:last-child {
  margin-bottom: 0;
}

.page-contact .pc-fix-meta {
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--lake-soft);
}

.page-contact .pc-fix-meta a {
  color: var(--lake-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .pc-fix-meta a:hover {
  color: var(--paper);
}

/* ---------- 备案信息 ---------- */
.page-contact .pc-slip {
  display: grid;
  gap: 8px;
  margin: clamp(34px, 5vw, 60px) 0 clamp(42px, 6vw, 76px);
  padding: 18px 20px;
  background: var(--pc-slip-bg);
  border: 1px solid var(--line);
  border-radius: 16px 16px 16px 6px;
}

.page-contact .pc-slip-icp {
  margin: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--lake-soft);
}

.page-contact .pc-slip-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 860px) {
  .page-contact .pc-fix-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 24px;
  }

  .page-contact .pc-compare {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-contact .pc-channels {
    grid-template-columns: 1.7fr 1fr 1fr;
    align-items: stretch;
  }

  .page-contact .pc-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    padding-left: 0;
    padding-top: 36px;
  }

  .page-contact .pc-steps::before {
    left: 14px;
    right: 14px;
    top: 15px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--lake), var(--sunset));
  }

  .page-contact .pc-step::before {
    content: "";
    position: absolute;
    top: -25px;
    left: 20px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--sunset);
    box-shadow: 0 0 0 4px rgba(255, 122, 47, .16);
  }
}

@media (min-width: 940px) {
  .page-contact .pc-hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-contact .pc-response {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
}

@media (max-width: 520px) {
  .page-contact .pc-timebar {
    gap: 4px;
  }

  .page-contact .pc-tick-bar {
    height: 44px;
  }

  .page-contact .pc-tick-day {
    font-size: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-channel,
  .page-contact .pc-step,
  .page-contact .pc-index-link,
  .page-contact .pc-copy {
    transition: none;
  }

  .page-contact .pc-channel:hover,
  .page-contact .pc-step:hover {
    transform: none;
  }
}